In China’s northeastern grain belt, farmers are getting a windfall from the government: more subsidies to grow soybeans, part of an estimated $1 trillion national effort to declare economic independence from the U.S. More than 7,500 miles away, in Milwaukee, the industrial-parts manufacturer Husco is scrambling to use fewer Chinese-made components in its U.S. factories, as the Trump administration wields tariffs to reduce imports and try to resurrect American manufacturing.  “Some customers,” said Husco Chief Executive Austin Ramirez, “are demanding zero exposure to China.” The forces underlying these two trends are driven by a reality settling in across Washington and…